Gas-heater.



.PATENTED APR. 4, 1905.

E. LABERGE.

GAS HEATER. APPLIOATlON FILED DEO.6,1904.

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WITNESSES SW No. 786,300. PATENTED APR. 4, 1905.

B. LABERGE.

GAS HEATER.

APPLICATION FILED D30. 5. 1904.

2 SHEETS-SHEET 2 WITNESSES INVEN'IOR I .EPHRAIM LABERGE @4 W mdwPatented April 4, 1905.

PATENT OFFICE.

EPHRAIM LABERGE, OF MONTREAL. CANADA.

GAS-HEATER.

SPECIFICATION forming part of Letters Patent No, 786,300, dated April 4,1905. Application filed December 5, 1904. Serial No, 235,450.

To (0Z7 whom it may concern.-

Be it known that I, EPHRAIM LABERGE, a subject of the King of GreatBritain, residing at Montreal, in the Province of Quebec and Dominion ofCanada, have invented a new and useful Gas-Heater, of which thefollowing is a specification.

My invention relates to improvements in stoves or furnaces of what areknown as the hot-air type, in which the air is circulated over andbetween heated surfaces and when at the desired temperature isdischarged through suitable conduit-flues into the rooms or otherchambers which are to be heated. It relates, however, more particularlyto gasstoves of that class which are designed to employ either naturalor artificial gases as a fuel in such a manner that, if desired, therewould be no intermingling of the products of combustion with the heatedair, thereby contaminating the same.

A principal object of my invention lies in the provision of a heatingapparatus as above defined of such improved construction and arrangementof parts that the greatest possible proportion of the total heatgenerated by the burner will be converted into heat utilized solely forthe purposes of warmth.

A further object of my invention is to so adapt the parts of the samethat the radiatmg and absorbing surfaces will produce the greatestpossible draft and circulation of the air to be heated and at the sametime will allow a minimum amount of heat to escape absorption and passaway through the outlet-flue.

A further object of my invention is to form a heater composed,essentially, of a system of units so designed with relation tothemselves and other parts of the device that any given number of themmay be assembled into an operative structure the size of which willdepend upon the number of parts incorporated into the same. Such asystem permits of the greatest of elasticity, and predetermined sizesmay be readily reached according to the will of the operator.

A still further object of my invention is to provide a heater whichwhile of the greatest simplicity and of fewest number of parts in designand construction will nevertheless be very effective in operation anddurable in service and at the same time be capable of being made,transported, and assembled at small cost.

Further objects and advantages of my invention will appear uponreference to the following description and claims, when taken inconnection with the accompanying drawings, in which like letters ofreference denote corresponding parts throughout all the figures, ofwhich- Figure 1 is a general upright view of my invention, being shownpartly in section. Fig. 2 is a view in sectional perspective from aposition looking backward at the units of my system. Fig. 3 is asectional view showing the adjustably-weighted lever forming a part ofmy cut-off. Fig. 4 is an enlarged view illustrating the jointure betweenthe dished plates.

Referring to the drawings now more par ticularly by reference-letters,it will be seen that my invention comprises, essentially, a number ofunits so shaped and dished that they may be automatically fittedtogether, so as to formulate a heater having a main serpentinepassage-way for the heated gases resulting from the combustion, andsurrounding such passage-way are proper channels for the circulation ofthe air which is to be heated in my device, whereby the automaticcirculation will be insured.

The baffle-plates or units of my system are of uniform proportion andadapted for closefitted application to each other to form a structure ofthe type previously designated.

In Fig. 1 I have illustrated a furnace composed of three main sectionsresting upon a suitable fire-box and surmounted by a cap of suitableconstruction adapted for the carrying off of the products of combustionand the heated air. The fire-box comprises a cylindrical casing T,having a suitable doorT and in the upper end an annular supporting-ringS, provided with numerous perforations R, thereby creating a properair-inlet for the outer heating-chamber. The gases from the burner,which is located within the base, are

. i J' i intended to pass upward and follow a serpentine course betweenthe baffle-plates, being deflected into the entrance of the annularpassage-way between said plates by the outer top plate C. The annulargas-space results from the arrangement of the inner baffle-plates F, E,F, I), F, and E, which are successively oined together, as will ap pearfrom the drawings, and the outer baffleplates D, C, D, C, D, and C,likewise successively connected. The joints of the former series, whichI have shown by J, L, J, L, and J, are preferably best made by a slightdishing of the plates, as will appear from the illustrations, and thejoints of the outer series, whichI have desi nated by K, H, K, H, K, andH, are similarly devised. In order that full heating effect may beobtained from the heated annular gas-chamber, I provide means fordeflecting the air which is to be heated in a similar serpentine course,both adjacent the interior and the exterior of said heated chamber. Forthe interior arrangement I provide a bottom closure O for thebaffle-plate F and admit sufficient air through the said plate 0 bymeans of a fluepipe R. In regular sequence, corresponding with the largediameter of the interior formed by the prior-mentioned series ofbaffie-plates, I arrange deflecting-plates O, O, and O, which aresuitably aflixed by bolts U in a median position in respect to thebaffle plates between which it lies. These plates are furthermorepositioned, by means of suitable connections N, to a central verticalrod N, which is bolted at P to the top annular cap M, and thereby servesto position the heretofore mentioned baffle plates, as well as thebottom cap 0. It will thus be seen that this arrangement provides asystem in which the air entering the inner chamber follows a regularserpentine course while adapted for the high degree of heatingefficiency which I desire to attain and finally emerges at the top intoan outlet-pipe Q.

In order to fully utilize the exterior heating-surface of thegas-chamber, I provide a series of baffle-plates B, B, B, and B, as wellas the cylindrically-inclosing rings A,-A, and A so dished andproportioned that adjustable tight joints will be formed, as illustratedat B, B, and B, it being observed that this last-mentioned series ofplates is supported by the annular ring S. The inner plates B, B, B, andB are so proportioned as to leave suitable annular spaces G, G, G, and Gadjacent the inner connections of the gas-chamber, whereby the readyflow of the external fresh air along a serpentine passage adjacent theheated plates is insured. This air emerges, as does the inner air, intoa dis charge-pipe At the top of the gas-chamber I provide a circularannular plate M, from which leads a pipe Q for the carrying oil of theproducts of combustion. In order that the scope of the latter may beregulated, I provide a suitable damper IV, which is adapted for partialor complete closure.

I have discovered that a very high degree of efficiency is attained whenthe above-mentioned damper is wholly closed and the heated gases arecompletely retained within their chamber, since thereby no heat whateveris lost by being carried through the pipe Q.

I furthermore provide my heater with an automatic cut-off apparatus,which is as follows: The gas for the burner enters through the pipe Tand passes through a valve to the outer stem end T-, to which is securedthe eccentrically-weighted lever T, which is provided at the endopposite the weight with an adjustable contact T and T, which will bereadily understood by reference to Fig. 3. This contact-point is adaptedto coact with the expansible rod T, which is positioned above the burnerand protrudes, as will appear from Fig. 1. This rod is made of anysuitable non-combustible ma terial having a sufficiently highcoefficient of expansion and suitably rigid for the purpose, and, aswill be apparent, the instant the same is cooled owing to the lack ofgas-supply, resulting in the extinguishment of the burner, it willcontract, release the weighted lever T, and the latter by swinging downwill wholly close the gas-supply.

It will now be readily seen and understood from the foregoing that thevarious objects of my invention have been very completely carried out bymy present adaptation and that because of the serpentine highly-heatedair-passages in the interior of the furnace the cool air in the roomwill be drawn into the same and discharged in a highly-heated conditionwithout any contamination whatever with the smoke, gas, and otherproducts of combustion, which will pass up the flue to the chimneywithout any intermingling with the pure air.

It is obvious that such changes in the manner of operation and minordetails of construction of such parts as fairly fall within the scope ofmy invention may be made without departing from the purpose orsacrificing any of the advantages thereof-as, for instance,it is obviousthat dampers or other equivalent devices for regulating the flow of theoutgoing or incoming gases may be provided, as well as modifications inthe arrangement of the heating-chambers and baffle-plates; but this willbe regulated and understood upon referring to the appended claims,wherein the true scope of the invention is more exactly expressed.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is"

1. In a gas-heater, a vertical series of superposed similar outerinclosing sections ITO which flare outwardly at their upper end andinwardly as a flange at their lower end, whereby a short telescopicjoint is formed, domeshaped deflecting-plates therewithin, supported attheir lower extremities by said inturned flanges, a cylindrically-shapedbase member having an exterior perforated ring for supporting saidsections and plates, a series of successivelysuperposed baifle-platesthe lower of which is lap-jointed to the base member and an inner seriesof like baflieplates hung from the top, said plates arranged to form aserpentine vertical passage for the products of combustion, and acentral series of horizontal plane deflecting-plates.

2. In a gas-heater, a vertical series of superposed similar outerinclosing sections which flare outwardly at their upper end and inwardlyas aflange at their lower end, whereby a short telescopic joint isformed, domeshaped deflecting-plates therewithin supported at theirlower extremities by said inturned flanges, a cylindrically-shaped basemember having an exterior perforated ring for supporting said sectionsand plates, a series of successively-superposed baflle plates the lowerofwhich is lap-j ointed to and supported by the base member, a cap-platecarried by the upper end of said series of baflie-plates, a sectionalrod depending therefrom, a series of plane horizontal deflecting-platescarried thereby, a base-plate attached to the end thereof and an innerseries of baffle-plates supported upon said base-plate, saidbaflieplates arranged to form a serpentine vertical passage for theproducts of combustion,

In Witness whereof I have hereunto set my hand in the presence of twowitnesses.

EPHRAIM LABERGE. Witnesses:

ALBERTA NATHAN, STUART R. W. ALLEN.

